Wrench



Oct. 9, 1934. A. SWANSON WRENCH Filed March 10, 1954 2 Sheets-Sheet Invenior I flyv ed f. S zuanswn By W 0st. 9, 1934. A. 1. SWANSON 1,975,908

WRENCH Filed Marh 10, 1934 2 Sheets-Sheet 2 F 6 I 1y Inventor v flmaai iw Patented Oct. 9, 19314 tween srArs rArsNr oer-nos WRENCH Alfred I. Swanson, Princeton, 111.

Application March 10, 1934, Serial No. 715,010

1 Claim.

'o ity, convenience of operation, simplicity in construction, cheapness of manufacture, strength and durability, efficiency and reliability in action, and being otherwise well adapted to the purpose for which it is designed.

l" With the above and numerous other objects in view as will appear as the description proceeds, the invention consists in certain novel features of construction, and in the combination 7 and arrangement of parts as will hereinafter be 5..Imore fully described and claimed.

In the drawings: Figure 1 is a side elevation of a wrench embodying the features of my invention. Figure 2 is a top plan view thereof. Figure 3 is a bottom plan view thereof.

Figure 4 is a vertical longitudinal section therethrough.

Figure 5 is a horizontal section taken substantially on the line 55 of Figure 4. Figure 6 is a perspective view of the movable jaw and the rack formed integrally therewith. Figure '7 is a fragmentary bottom plan view of a modification.

Referring to the drawings in detail it will be seen that the numeral 5 denotes a head having a handle 6 extending from one side thereof adjacent the lower corner thereof. The other lower corner is cut away and a fixed jaw or shoulder v '7 is thereby formed. A guideway or passage 8 1s formed in the head at right angles to the shoulder '7. A pocket 9 is formed in the head extending longitudinally with the passage 8 alongside thereof and communicating therewith. A circular screw 10 is slidable and rotatable in 'ithe pocket or recess 9. An opening 11 is formed in the juncture of the handle 6 and the head 5 and inclines downwardly to communicate with the bottom end of the recess 9. A cam 12 is rockable on a pin 14 in the lower portion of the opening 11 and merges into a curved handle 15 extending above the handle 6. By rocking the handle 15 it will be seen that the cam 12 will cause the movement of the screw 10 upwardly or permit it to gravitate downwardly depending, of course, whether the handle 15 is swung downwardly or upwardly respectively. A movable jaw 16 is shaped to cooperate efficiently with the fixed jaw or shoulder '7 and has a web 1'7 formed thereon and on this web 17 is formed a rack 18. The web 17 and rack 18 are slidable in the passage 8 which is shaped to accommodate these elements. The rack 18 meshes with the screw 10 so that the movable jaw 16 moves with the screw toward or away from the fixed jaw '7. The screw 10, of course, may be turned to adjust the movable jaw with respect to the fixed jaw depending upon the size of the object to be gripped between these two jaws, and is held under tension by a spring 19. In the modification shown in Figure 7, the vertical inner edge of the jaw 16 is formed with the diverging walls 16", one on each side of the web 17' and the corresponding edge of the head 5' is formed with the converging walls 5" for contacting the diverging walls 16". Thus the diverging walls 16" of the movable jaw 16 act to prevent the slotted portion of the head which receives the web 17 and rack 18, from spreading under a heavy strain.

It is thought that the construction, operation, utility and advantages of this invention will now be quite apparent to those skilled in this art without a more detailed description thereof.

The present embodiment of the invention has been described in considerable detail merely for the purposes of exemplification since in actual practice it attains the features of advantage enumerated as desirable in the statement of the invention and the above description.

It will be apparent that changes in the details, of construction, and in the combination and arrangement of parts may be resorted to without departing from the spirit or scope of the invention as hereinafter claimed or sacrificing any of its advantages.

Having thus described my invention, what I claim as new is:

A wrench of the class described comprising a head having a recess in its lower outer corner to provide a substantially horizontal wall and a substantially vertical wall, the horizontal wall forming a stationary jaw, said head having a vertical passage therein opening out through the top and bottom of the head and the lower part of the passage opening out through said vertical wall and said head having a pocket of circular shape in cross section extending from the bottom edge of the head to a point spaced downwardly from the top portion of the head, said pocket being in communication with the passage and located in rear of said passage, a handle connected to the inner lower portion of the head and said head having a diagonally arranged passage therein at the junction of the handle therewith and extending from a point through the inner edge of the head to the lower end of the to co-act with the stationary jaw, a spirally threaded shaft rotatably and slidably arranged in the pocket with its threads engaging the teeth of the rack bar and the ends of the shaft being fiat, the lower end of the shaft engaging the cam and a spring in the pocket engaging the upper end of the shaft, the side faces of the head having openings therein exposing portions of the shaft. V V

ALFRED I. SWANSON. 

